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<head><meta charset="utf-8"><title>regression in incr comp due to #74949 · t-compiler/performance · Zulip Chat Archive</title></head>
<h2>Stream: <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/index.html">t-compiler/performance</a></h2>
<h3>Topic: <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/topic/regression.20in.20incr.20comp.20due.20to.20.2374949.html">regression in incr comp due to #74949</a></h3>

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<h4><a href="https://rust-lang.zulipchat.com#narrow/stream/247081-t-compiler/performance/topic/regression%20in%20incr%20comp%20due%20to%20%2374949/near/210688088" class="zl"><img src="https://rust-lang.github.io/zulip_archive/assets/img/zulip.svg" alt="view this post on Zulip" style="width:20px;height:20px;"></a> matthiaskrgr <a href="https://rust-lang.github.io/zulip_archive/stream/247081-t-compiler/performance/topic/regression.20in.20incr.20comp.20due.20to.20.2374949.html#210688088">(Sep 20 2020 at 22:18)</a>:</h4>
<p>for the record, <a href="https://github.com/rust-lang/rust/pull/74949">https://github.com/rust-lang/rust/pull/74949</a> seems to have regressed incremental builds (instructions as well as wall time)  by some extent <a href="https://perf.rust-lang.org/compare.html?start=10b3595ba6a4c658c9dea105488fc562c815e434&amp;end=5e449b9adff463455743291b0c1f76feec092992&amp;stat=instructions:u">https://perf.rust-lang.org/compare.html?start=10b3595ba6a4c658c9dea105488fc562c815e434&amp;end=5e449b9adff463455743291b0c1f76feec092992&amp;stat=instructions:u</a><br>
I already left a comment on the pr</p>



<hr><p>Last updated: Aug 07 2021 at 22:04 UTC</p>
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